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All Journal Berkala Perikanan Terubuk Komunikasi Fisika Indonesia SITEKIN: Jurnal Sains, Teknologi dan Industri ECSOFiM (Economic and Social of Fisheries and Marine Journal) Daya Saing : Jurnal Ilmu Manajemen Jurnal Akuntansi dan Ekonomika Juring (Journal for Research in Mathematics Learning) Jurnal Manajemen Pendidikan Penelitian Kualitatif IJEBA (International Journal of Economic, Business & Applications) Jurnal Cendekia : Jurnal Pendidikan Matematika ABDIMAS: Jurnal Pengabdian Masyarakat Al-Khwarizmi: Jurnal Pendidikan Matematika dan Ilmu Pengetahuan Alam Procuratio : Jurnal Ilmiah Manajemen Kurs : Jurnal Akuntansi, Kewirausahaan dan Bisnis Instructional Development Journal Jurnal Pengabdian Masyarakat Multidisiplin Dinamika Lingkungan Indonesia Jurnal Economica: Media Komunikasi ISEI Riau Journal of Educational Sciences Innovative: Journal Of Social Science Research EcoNews

Zulkarnain Zulkarnain

Universitas Riau

Author-ID : 2496830

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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SEGMENTASI CITRA PARU-PARU MENGGUNAKAN METODE KONTUR AKTIF DENGAN VALIDASI ROC Sintha Syaputri; Zulkarnain Zulkarnain
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

Segmentation is the process of separating parts of objects from the background by dividing images that have different object intensities with each other such as in imaging of body parts. Active contour segmentation was used for medical imaging that resistant to noise around objects. This study used 5 chest X-Ray images, specifically to the lungs with a grayscale format measuring 256 x 256 pixels, through the preprocessing process and filtering a Gaussian filter, each image was inputted to the R2015a version of the matlab GUI program. Then the segmentation had done by using the active contour method. In this method a curve in the form of a small circle was placed on the edge of object to be segmented. The curve will move according to the shape of the outer edge of the lung based on the values of active contour parameters such as Alpha, Beta, Gamma, Kappa, WEline, WEdge, WEterm and Iteration. Validation was done by using the ROC (Receiver Operating Characteristic) method and were obtained an average percentage with an accuracy value of 96.26%, a specificity of 96.47% and a sensitivity of 76.54%.

INVESTIGASI PENGARUH PENAMBAHAN TUGAS TERHADAP HASIL BELAJAR SISWA: TEMUAN DI SMP NEGERI 1 LEWA KELAS VII Ochtavia Lutfi; Zulkarnain Zulkarnain
Komunikasi Fisika Indonesia Vol 17, No 2 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.17.2.55-61

The learning process of goodness and organized teaching staff is highly prioritized to achieve the competencies expected to all students. Ineffective delivery due to time constraints, especially in science lessons causes the learning process run unwell. Besides the discomfort in learning is also an important problem in every teaching and learning process. Often students feel bored with the material delivered too monotonous and make students not pay attention to the teacher during studying. A new method of providing additional assignments at the end of each meeting is carried out in this study to obtain a change in students' interest in learning well. This study has two cycles with stages of planning, action, observation, reflection, and the end of the action. Direct observation is applied to this research method. The results showed that the first cycle had an increase in interest in learning from pre-cycle 33.33% to 50% with 20 students who had reached the minimum threshold (KKM) and 12 students who had not either. Increased interest in learning with very good criteria occurred in the second cycle with a percentage of 83.33% in which 31 students reached the KKM and 1 student was not.

PENENTUAN KOMPOSISI KIMIAWI ATMOSFER DAN TEMPERATUR EFEKTIF PADA BINTANG VEGA (α Lyr) DENGAN MENGGUNAKAN METODE SPEKTROSKOPI ABSORPSI Fitri Yuliana; Zulkarnain Zulkarnain; Hakim Luthfi Malasan
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

The star spectrum is an information which is though to be a map of the star. The shape of the spectral line actually shows the nature of the star atmosphere, which is the only part researcher can be reached. The intensities of spectral lines will determine the chemical composition of the stars contained in the atmospheres of the stars. The approach used to determine the chemical composition and the effective temperature of the star is spectroscopy. The spectroscopy method had been done in this study using the GAO-ITB RTS telescope system which consisting of the Celestron C11 telescope, NEO-R 1000 spectrograph and CCD SBIG ST-8 camera. The object studied is Vega (α Lyr) star which has a magnitude of 0.00 that the main sequence star of the A0 spectrum class. The image data obtained then be processed using IRAF software to obtain the final spectrum graph with the y-axis representing the flux in erg cm-2s-1 and the x-axis representing the wavelength in units of Å. Furthermore, we match the absorption wavelength on the final spectrum graph to the existing wavelength of the Atomic Spectra Database (ASD) to identify the atmospheric chemical composition of the Vega star. Effective temperature can be calculated by using the Wien shifting laws by find out the maximum wavelength of the final spectrum graph. The most found element in the atmosphere of Vega star was hydrogen (H) that consist of Hε, Hδ, Hγ, Hβ, and Hα. The value of effective temperature of the Vega star is 7136 K that has difference percentage of 22.85 % from the mean temperature of A type star.

VISUALISASI KONTRAS SPEKEL MENGGUNAKAN PROGRAM SCIKIT IMAGE DAN PULSA DETAK JANTUNG BERBASIS ARDUINO UNO PADA TIKUS PUTIH YANG DIINDUKSIKAN ALOKSAN Zulkarnain Zulkarnain; Nur Melati
Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

Speckle contrast visualization and heart rate pulses on rats induced with alloxan were successfully carried out. This research aims to visualize speckle contrast measurements using the Scikitimage program and analyze the relationship between speckle contraston rats to blood sugar levels and also to determine the effect of alloxan induced on heart rate frequency in rats. This study obtained speckle pattern image data from rats induced by alloxan with variations in concentrations of 35%, 55% and without alloxan for 12 days of treatment. The sample used were3 to 5 months old. The method conducted in speckle contrast visualization was using blob detection with Laplacian of Gaussian algorithm to obtain speckle contrast values while the visualization of heart rate pulse based on Arduino Uno was done using the Integrated Development Environment (IDE) program. The results obtained from image processing using the Scikitimage program show that the contrast value could achieved decreasing with increasing blood sugar levels and the results obtained for detection of heart rate was the greater the blood sugar level the greater the heart rate (beat per minute) measured.

EFEK PENAMBAHAN ATOM TEMBAGA (Cu) DAN PERAK (Ag) PADA MATERIAL AKTIF NANOMATERIAL ZnO SEL SURYA FOTOELEKTROKIMIA Windayani Windayani; Iwantono Iwantono; Awitdrus Awitdrus; Zulkarnain Zulkarnain
Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

ZnO material coated with Cu + Ag was successfully grown using seed mediated hydrothermal method at a temperature of 90° C for 8 hours with a variation of concentration of Ag, 10 mM, and 20 mM. The growth of ZnO nanomaterials was carried out on the FTO substrate (Flourine Tin Oxide). The Samples were characterized using, Field Emission Scanning Microscope (FESEM), and X-ray Diffraction (XRD). The FESEM photos show ZnOnanorod coated with Cu + Ag have grown on FTO having a nanoflower shape that consructed from ZnOnanorods with their orientation . The XRD pattern shows five peaks at 2θ: 31.69 °; 34.36 °; 36,18 °; 47.52 °; and 56.4 °. Based on the results of the analysis of the OriginPro 8 program each peak in a row according to the crystal orientation (100), (002), (101), (012), and (110). The stongest line was found in the crystal plane (101). DSSC was fabricated using ZnO nanomaterial coated with Cu + Ag as active material, N719 dye, liquid electrolyte, and plastisol as catalyst on the counter electrode. The results of I-V measurements at halogen lamp with ilumination its intensity of 100 mW/cm2 of the cells has producedthe highest efficiency value based on Cu coated ZnO was based DSSC 0,98% with a Cu concentration of20mM.These results show that the addition of Cu layer can increase the efficiency of DSSC based on ZnO by 123% compared to ZnO without Cu based DSSC. Addition of Ag to active material of Cu coated ZnO nanomaterial did not have a positive effect on the efficiency of DSSC cells.

MORFOLOGI DAN EFISIENSI SEL SURYA FOTOELEKTROKIMIA BERBASIS NANOSTRUKTUR ZnO DILAPISI TEMBAGA Iwantono Iwantono; Sella Natalia; Rinaldo Abdi; Awitdrus Awitdrus; Zulkarnain Zulkarnain
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

ZnO nanostructures coated Cu (Copper) have been successfully grown using a method of seed mediated hydrotermal. The growth of Cu coated ZnO nanostructures were used as an active material of DSSC. The Cu on ZnO nanostructures has been coated at a concentration of 10 mM at room temperature in 30 minutes. The samples were characterized using Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive X-ray (EDX). The FESEM images showed that the geometrical shape of ZnO nanostructures was nanoflower. Spectra of EDX showed Cu was really exist in all samplesof about 0.8%. A DSSC was fabricated by using the ZnO nanostructured coated Cu as an active material.The results of I-V measurements under iluminattion of halogen lamp its intensity of 100 mW/cm2 has produced efficiency 0.35% (DSSC without copper) and increasedto 0,43% whenCuwas coated on ZnO.

Co-Authors Ahmad Zakiamani Aisyah Nurul Rahmah Alvi Purwantie Alwie Anuar Rasyid Aris Rakhman Nugraha Atma Murni Awitdrus Awitdrus, Awitdrus Badrulaini Badrulaini Bambang Arianto Darwis Darwis Devia Sari Deviasari Deviasari Edi Kurniawan Ediyanus Herman Halim Edyanus Herman Halim Efni Noor Salam Eka Armas Pailis Ernawati Ernawati Fitri Yuliana Fitriana Fitriana Geovani Meiwanda Gimin Gimin Gushailen Putra Kamil H. B. Isyandi Hadriana Hadriana Hakim Luthfi Malasan Hasnah Faizah AR Helwin Yunus Hotmatua Hotmatua Irfan Wirya Febriansyah Isma Mulyani Iwantono Iwantono Jahrizal Jahrizal Janius Flantiono Juniyanto Sudarna Kartini, Kartini Khozin Mu'tamar Kusai Kusai Lamun Bathara Lilis Sulistyowati Maimunah, Maimunah Mardona Mardona Marnis Marnis Maryati Maryati Mia Riani Rahman Morri Manik Nahor Murani Hutapea Nesi Kurniati Nugrahani Trie Ryzzky Nur Melati Ochtavia Lutfi Raden Lestari Garnasih Rafidianto Wibisono Rahmadi Rahmadi Rahmat Hidayat Rendra Wasnuri Wasnuri Reni Suryanita Ricky Purnama Sanjaya Rinaldo Abdi Riski Islami Syaiful Samsir Samsir Satria Satria Sehatta Saragih Sella Natalia Sintha Syaputri Sri Endang Kornita Sri Indarti Sri Wardani Supriadi Putra Susda Heleni Suyanto Suyanto Syapsan Syapsan Tomi Ramadona Tri Sukirno Putro Trisla Warningsih Wijatmoko Rah Trisno Windayani Windayani Yanti Yanti Yusni Ikhwan Siregar Zulfan Saam Zulham Azhar

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